Centrifugal machine.



- No. 732,220. -IATENTED JUNE 30,1903. G. POTI, J. H. GASSBLS, D. YfGASSELS, R. WILLIAMSON 6v A. M. STUART.

GENTRIPUGAL MACHINE. APrLIoATIoN FILED 001,9. 1902.

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UNITED" STATES atented J' une 30, 1903.

PATENT OFFICE.

GIDEON POTT, JOHN HOUSTON CASSELS, DAVID YOUNG CASSELS, ROBERT WILLIAMSON, AND ALEXANDER MOODY STUART, OF MOTI'IERWELL,

SCOTLAND.

OENTRIFUGAL MAcl-llNl-z.A

SPECIFICATION forming part of Letters Patent N0.v'732,2270, dated June 30, 1903.

Application ied october 9. 1902.

To all whom it may concern/: I

Be it known that we, GIDEON POTT, JOHN HOUSTON OAssELs, DAVID YOUNG CAssELs, ROBERT WILLIAMSON, and ALEXANDER MOODY STUART, subjects of the King of the United Kingdom of Great Britain and Ireland, residing at Motherwell, county of Lanark, Scotland, have invented certain new and useful Improvements in Centrifugal Machines, (for which application for patent has been made in Great Britain, No. 19,069, dated August 30, 1902,) of which the following is a specification.

In suspended selfbalancing centrifugal machines of the well-known Westonltype the step-bearing is situated within the outer revolving spindle, and therefore the said bearing is limited in size by the bore of the outer spindle, and it is also somewhat inaccessible.

The object of this invention is to enable the step-bearing in such machinesv to. be readily accessible and to permit of much larger step` bearings being used. For these purposes we make the inner stationary spindle hollow or tubular and pass up through it a central spindle, which is attached at its lower end to the outer revolving spindle of the machine, so as to revolve with it, the upper end of 4said central spindle being adapted to carry the revolving part of the step-bearin g, whose stationary part is attached to the top of the stationary spindle. Y

The invention is illustrated, by Way ofeX'- ample, in the accompanying drawings, inwhichy Figure l is a sectional elevation of a centrifugal machine whose drivin g-spindle, stepbearing, and relative parts are constructed in the manner shown to a larger scale in vertical section at Fig. 2, while Fig. 3 shows in vertical section a slightly-modified form of the driving-spindle.

As shown by the drawings, the centrifugal machine is carried in the usual Way by a framing o, the basket b being'titted to rotate Within a stationary casingc. The' basket is' attached, as usual, to the hollow revolving spindle d, which is driven by a belt-pulley e or by a motor or in any other usual way; but the inner stationary spindle f instead of being solid and having the usual step-bearing SerialNo.l26,6l6. (Nomodl.) v

at its lower end Vis made tubular, as shown, and has passed up through it a solid central spindle g, which is formed with an enlarged plunger-like end piece g', pinned or keyed to 55 the outer spindle d, so to rotate with it. Between the rotating central spindle g and the stationary hollow spindlef aguide-sleeve or hollowibearing h is fitted, as shown at Fig. 2, or is formed on the plunger-like end of the central spindle, as shown at Fig. 3. The upper end of the central revolving spindle g has fixed toit a boss or disk fr', carrying the upper cone or ring 1l' of a ball-race, whose lower ring or stationary part.. is attached to a casing la at the upper end of the stationary spindle f, the balls j of the bearing being fitted between the rings composing the ball-race.

Instead of a ball-bearingsuch as is shown at Fig. 2 the step-bearing may be formed by 7o flat disks or washers or the bearing may be a uid bearing.

VBy the arrangement described a step-bearing of much larger Aarea is provided than could be placed within the outer revolving 75 spindle d in the ordinary way, and liability of heating and breaking down is obviated.

The casing 7c, which incloses the step-bearing, is adapted to hold the oil or other fluid which serves to lubricate the bearing.

The stationary spindle f is secured at its upper end in the top block Z, furnished with rubber buffers m in any usual way, and between the stationary spindle f and the upper end of the outer revolving spindle d is fitted a guiding-bush n.

Having now described the invention, what we claim, and desire-to secure by Letters Patent, is-

1. In a centrifugal machine, the hollow sta- 9o tionary spindlef, the outer revolving spindle d, the internal central spindle g secured at its lower end to the said outer revolving spindle d.

2. In a centrifugal machine, the hollow stationary spindle f, the outer revolvingspindle d, the internal central spindle g secured at its lower end to the said outer revolving spindle d, the step-bearing fitted overhead and formed between the upper end of said hollow stationary spindle and that of the said central spindle.

IOO

3. In a centrifugal machine, the combination of an outer revolving spindle, said spindle having a hollow upper end and a stationary spindle inserted in said hollow upper end, an internal central spindle connecting said outer revolvingspindle to the stationary spindle and revolving with the former.

4. In a centrifugal machine, the hollow stationary spindle f, the outer revolving spindle d, the internal central spindle g secured at its lower end to the said outer revolving spindle d, the step-bearing fitted overhead and formed between the upperend of said hollow stationary spindle and that of the said central spindle, the casing t inclosing the said bearing and adapted to hold the lubricant.

5. In acentrifugal machine, the hollow stationary spindlef, the outer revolving spindle d, the internal central spindle g secured at its lower end to the said outer revolving spindle d, the boss c' keyed to said central spindle, the ring z" secured to said boss, an upper hearing-surface formed under and supporting said ring i".

6. In a centrifugal machine, the hollow stationary spindle f, the outer revolving spindle d, the internal central spindle g secured at its lower end to the said outer revolving spindle d, the boss keyed to said central spindle, the ring t" secured to said boss, a bearing-surface secured to and supported by said stationary spindle.

7. In a centrifugal machine, the hollow stationary spindle f, the outer revolving Spindle d, theinternal central spindle g secured at its lower end to the said outer revolving spindle d, the boss rl keyed to said central spindle, the ring 1'. secured to said boss, and a casing 75 on the stationary spindle, provided with a bearing for said ring t'.

8. In a centrifugal machine, the hollow stationary spindle j", the outer revolving spindle d, the internal central spindle g securedat its lower end to the said outer revolving spindle g, the boss t' keyed to said central spindle, the

ring t" secured to said boss, a casing 7c on the stationary spindle, a raceway in said casing, and balls j in said raceway, adapted to support said ring 2".

9. In a centrifugal machine, the hollow stationary spindlef, the outer revolving spindle d, the internal central spindle g secu red at its lower end to the said outer revolving spindle d, the boss t' keyed to said central spindle, the ring 1l secured to said boss, a casing 7c on the stationary spindle, a raceway in said casing, ballsj in said raceway, supporting said ring i', and the top block Z supporting said hollow stationary spindle.

l0. In a centrifugal machine,the hollowstationary spindle f, the Outer revolving spindle d, the internal central spindle g secured at its lower end to the said outer revolving spindle d, the bossi keyed to said central spindle, the ring t" secured to said boss, a casing 7c on the stationary spindle, a raceway in said casing, halls.;` in said raceway, supporting said ring z", and the top block Zsupporting said hollow stationary spindle, the buffers m, transmitting to the said top block the weight of the said hollow stationary spindle.

1l. In a centrifugal machine, the combination with the hollow rotating spindle, of a hollow stationary spindle secured to the usual top block, the said top block, an inner rotating spindle keyed to the outer spindle so as to revolve with it, and a step-bearing formed above the stationary spindle to support the rotating spindles as described.

In witness whereof we have hereunto setour hands in presence of two witnesses.

GIDEON POTT.

JOI-IN HOUSTON CASSELS. DAVID YOUNG CASSELS. ROBERT WILLIAMSON. ALEXANDER MOODY STUART.

Witnesses:

WALLACE CRANsToN FAIRWEATHER, JOHN MoRToN. 

